The utility model discloses a replaceable forming die and soldering tin sleeve forming equipment. The replaceable forming die comprises a stepped shaft, the stepped shaft comprises a lantern ring step, a gasket step, a clamping ring step and a locking step which are connected in sequence, the outer diameter of the gasket step is larger than that of the lantern ring step, and the outer diameter ofthe clamping ring step is larger than that of the gasket step and that of the locking step; the gasket is detachably arranged on the gasket step in a sleeving mode and matched with the clamping ring step, and the gasket is used for fixing the heat-shrinkable sleeve; the fixing piece is detachably connected to the locking step, and an installation space used for being matched with an operation platform is formed between the fixing piece and the clamping ring step. The replaceable forming die is simple in structure, low in manufacturing cost, capable of being used for automatic production of soldering tin sleeves, simple in automatic ring adding equipment composition, convenient and fast to operate, capable of achieving automatic and batched production of the soldering tin sleeves, convenient to repair and maintain, few in steps of an automatic ring adding method, easy to operate and high in machining efficiency.